books.google.com - Ho for California! The terminus of the first overland immigrant pack train destined for California was John Marsh's adobe, Brentwood. Since 1841, East Contra Costa County has been a grain and fruit basket to the world, a recreational playground for resort living, and a home for health and family life....http://books.google.com/books/about/East_Contra_Costa_County.html?id=2GTf3-n_a1QC&utm_source=gb-gplus-shareEast Contra Costa County